39
RS232 Commands, continued…
Request status information
?S<cr>
Returns the model name, firmware version number, instrument
serial number and number of logged readings in memory, for
example…
90FLMV•V10.0•S1234•7230•mASLB+v%
<cr>
where
•
are spaces. Note that the number of logged readings is
right-justified. The meaning of the last group of characters is as
follows…
m
Dissolved Oxygen stirrer output is enabled.
A
or
P
A indicates A & B function is enabled.
P indicates A is set to Pond Number.
S
Unit is powering Dissolved Oxygen stirrer.
L
Automatic data logging is enabled.
B
Low Battery warning.
+
Extended data logging function is fitted.
v
Battery volts is available with ?V command.
%
Indicates new 90 series, V10.0 and up.
Request GLP information
?G<cr>
Returns all calibration GLP information, plus the instrument
model, serial number and current date (see section 12.7 for data
format and hand-shaking).
Enable Rate per Day or Time of
Day automatic data logging
?J<cr>
Starts automatic data logging when the
90-FLMV
is set up for
Rate per Day or Time of Day automatic data logging (see section
11.3.1).
The meter must then be powered down with the OFF key or with
the ?K command (see below).
Disable Rate per Day or Time
of Day automatic data logging
?F<cr>
Stops automatic data logging when the
90-FLMV
is set up for
Rate per Day or Time of Day automatic data logging (see section
11.3.1).
Power ON
Any 10
characters
Switches the
90-FLMV
ON.
A
specific
command
is
not
available
while
the
90-FLMV
is off, so RS232 activity caused by the 10 characters
switches the unit ON.
Power OFF
?K<cr>
Switches the
90-FLMV
OFF. Use the command after the ?G
command (above) to actually start rate per Day or Time of Day
automatic data logging.
Turn Dissolved Oxygen stirrer
ON
?M<cr>
Starts the Dissolved Oxygen stirrer to run continuously until
stopped. The stirrer output must be enabled (see section 3.5.1)
Turn Dissolved Oxygen stirrer
OFF
?N<cr>
Stops the Dissolved Oxygen stirrer.
Request battery volts
?V<cr>
Returns the current voltage level in the battery pack, for
example…
7.20V
<cr>
Positions of Data Fields
?P<cr>
Returns the number of data fields, along with their position and
length. When the A&B Data Input function is disabled…
8,1,10,12,8,21,4,26,5,35,7,46,5,54,5,62,5
This denotes 8 fields, the first of which is at column 1 and is 10
characters long. The second field is at column 12 and is 8
characters long and so on.
When the A&B Data Input function is enabled…
10,1,10,12,8,21,4,26,5,35,7,46,5,54,5,62,5,70,4,76,4
Data Column Header
?H<cr>
Returns a text string which can be used to provide headers for
each data field. Spaces are included to ensure that the headers are
correctly aligned with the data.
